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Cocaine is often self-administered by nasal inhalation, intravenous injection and free-base smoking. It is excreted in the urine in a short time primarily as Benzoylecgonine.2,3 Benzoylecgonine, a major metabolite of cocaine, has a longer biological half-life (5-8 hours) than cocaine (0.5-1.5 hours), and can generally be detected for 24-48 hours after cocaine exposure.
If you use enough cocaine to to feel any effects at all, even mildly, then chances are you will have a detectable level for several days after.
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Confirmation Drug Testing is recommended when an instant employee drug testing kit delivers a positive or "non-negative" result. Companies that understand the need for legally defensible employee drug testing procedures and policies know that using Confirmation Services for non-negative results greatly minimizes their overall liability. This is particularly true in the case of employees who have been fired, involved in an accident or for those who are not hired.